Spectacle lens and method for producing a spectacle lens

ABSTRACT

A spectacle lens has a transparent substrate and at least one HOE-capable polymer layer arranged on the transparent substrate. The at least one HOE-capable polymer layer is suitable for forming a holographic optical element. Related methods and apparatus are described.

CROSS REFERENCE TO RELATED APPLICATIONS

This application is a 35 U.S.C. § 371 national stage application of PCTInternational Application No. PCT/EP2016/062428, filed on Jun. 1, 2016,which claims priority from German Patent Application No. DE102015109703.6, filed on Jun. 17, 2015, the contents of which areincorporated herein by reference in their entireties. Theabove-referenced PCT International Application was published in theGerman language as International Publication No. WO 2016/202595 A1 onDec. 22, 2016.

TECHNICAL FIELD

Embodiments of the invention relate to a spectacle lens and a method forproducing a spectacle lens and spectacles. More particularly, variousembodiments relate to techniques for forming an HOE-capable polymerlayer that is arranged on a substrate of the spectacle lens and issuitable for forming a holographic optical element.

BACKGROUND

Techniques are known for the production of optical structural elementsthat form a holographic optical element (HOE). HOEs typically refer tooptical structural elements in which the holographic properties are usedto achieve a specified beam path of the light, such as, for example,focussing or collection, dispersion, and/or mirroring. In this manner,specified optical functionalities can be implemented. The holographicproperties in turn utilize the wave nature of light, more specificallycoherence and interference effects. In this case both the intensity andthe phase of the light are taken into consideration.

For example, techniques are known from the document US 2001/0055094 A1,in which an optical lens is formed from polymerizable material in amold. However, such techniques have various limitations or drawbacks.For example, the polymerizable materials suitable for forming an HOE aretypically relatively soft and show low stiffness and strength. Morespecifically, this can lead in connection with spectacle lenses toincreased susceptibility to external stresses, such as, for example, inthe event of a fall or with respect to abrasive media. This can limitthe resilience of the spectacle lens. Moreover, the opticalfunctionalities that can be implemented by means of such a spectaclelens based on holographic properties such as, for example, refractivepower, correction of astigmatism of the eye, chromatic correction,higher-order corrections, or corrections varying with viewing angle,etc. can be limited.

SUMMARY

There is therefore a need for improved spectacle lenses and improvedmethods for producing corresponding spectacle lenses. More particularly,there is a need for techniques that overcome at least one of theabove-mentioned drawbacks. More particularly, there is a need forrelatively robust spectacle lenses that are not highly defect-prone andcan contain/accommodate an HOE.

According to an embodiment, the invention relates to a spectacle lens.The spectacle lens comprises a transparent substrate. The spectacle lensfurther comprises at least one HOE-capable polymer layer that issuitable for forming an HOE. The at least one HOE-capable polymer layeris arranged on the transparent substrate.

The substrate can be transparent to visible light; transmission of thevisible light through the substrate can also at least partially takeplace. The transparent substrate can, for example, absorb individualspectral ranges of the light more strongly than other ranges; in thismanner, selective transmission can be implemented. The substrate canimpart a basic mechanical structure to the spectacle lens and thusprovide a certain mechanical resilience of the spectacle lens. Thesubstrate can also implement optical functionalities of the spectaclelens. For example, the substrate can constitute an optical lens. Thiscan, for example, allow a specified refractive power of the spectaclelens to be achieved. Visual defects in the eye of a user can thus becompensated for or corrected.

Special optical mineral glasses and polymers can be used as the materialfor the substrate. For example, the transparent polymer substrate can beselected from the following group: polyallyl diglycol carbonate (ADC);polyurethane (PUR); acrylate and allyl systems; polythiourethanes (PTU);episulfide/thiol systems; and thermoplastics such as, for example,polycarbonate or polyamide. The center thickness of the substrate can,for example, be in the range of 1-3 mm, and preferably approx. 2 mm. Inthis manner, the transparent substrate can provide a relatively highrobustness of the spectacle lens. Moreover, it can be possible toimplement specified optical functions. The thickness of the substratecan vary as a function of location.

The at least one HOE-capable polymer layer can be arranged on thesubstrate in a wide variety of ways. For example, the at least oneHOE-capable polymer layer can be arranged immediately adjacent to thesubstrate. However, it would also be possible for further layers to bearranged between the at least one HOE-capable polymer layer and thesubstrate, for example, a primer layer for improving the adhesion of thepolymer to the substrate. Alternatively or additionally, it would alsobe possible for a fixing layer for fixation of the HOE-capable polymerlayer on the substrate to be located between the HOE-capable polymerlayer and the substrate.

The arrangement of the at least one HOE-capable polymer layer on thesubstrate can make it possible for the spectacle lens as a whole—despitethe typically relatively soft material of the at least one HOE-capablepolymer layer—to show high robustness. More specifically, the spectaclelens can be configured to be relatively stable with respect to breakage.

The HOE-capable polymer layer can, for example, comprise a matrix of aspecified polymer (polymer matrix). This polymer matrix can impart aspecified structure to the polymer layer.

It is possible for the at least one HOE-capable polymer layer to formthe HOE. The at least one HOE-capable polymer layer can then comprise anHOE polymer. The HOE polymer can, for example, be embedded in thepolymer matrix; more specifically, the HOE polymer can be different fromthe specified polymer that forms the polymer matrix. Induced localvariations in the density of the chains of the HOE polymer typicallycause a local variation in the refractive index of the HOE-capablepolymer layer and thus form the HOE. A corresponding structure of theHOE polymer can, for example, be achieved by suitable exposure of aphotoreactive component.

It is also possible that the HOE-capable polymer layer does not form theHOE, but it is also possible, for example, to form the HOE in theHOE-capable polymer layer by means of suitable exposure and/or furtherprocessing steps. In order for the at least one HOE-capable polymerlayer to be suitable for forming the HOE, the at least one HOE-capablepolymer layer can comprise the photoreactive component or a plurality ofphotoreactive components. The individual molecules of the photoreactivecomponent, for example, can be embedded in the polymer matrix. Thephotoreactive component can comprise a polymer reactant. The polymerreactant can be converted into the above-mentioned HOE polymer, whichfinally forms the HOE. The conversion can take place via concatenationand/or crosslinking of shorter molecules of the polymer reactant. Theconversion could also comprise rearrangement of already concatenatedand/or crosslinked molecules of the polymer reactant. For example, thepolymer reactant can be a photopolymer or a photomonomer.

For example, the photoreactive component can comprise a dye; forexample, individual molecules of the dye can be coupled to individualmolecules of the polymer reactant. It is also possible for thephotoreactive component to comprise further components such as, forexample, initiators, etc. By means of the dye and/or the initiator, thepolymer reactant can be converted on exposure to light of apredetermined wavelength into the HOE polymer. The individual moleculesof the polymer reactant can—in a situation in which the at least oneHOE-capable polymer layer does not form the HOE—be unconcatenated oruncrosslinked, form relatively short chains of molecules or networks,and/or form specially arranged chains or networks of molecules.Molecules of the polymer reactant can be crosslinked and/or rearrangedby exposure in a suitable wavelength range, so that the HOE polymershows an unchanged structure and/or distribution with respect to thepolymer reactant.

By means of such polymerization, the refractive index of the at leastone HOE-capable polymer layer can be locally modified with respect to avalue for the unexposed polymer layer.

For example, the spectacle lens can further comprise a diffusion barrierlayer. The diffusion barrier layer can be immediately adjacent to theHOE-capable polymer layer. The diffusion layer can prevent the HOEpolymer or the photoreactive component from diffusing over time.

In general, there are various possibilities for using the HOE forimplementing optical functions. For example, the optical functionalitycan be selected from the following group: a lens; a mirror; awavelength-specific mirror; a prism; a transflective beam combiner; aconverging lens; a scattering lens; a concave mirror; a convex mirror; acolor filter; data spectacles; and combinations thereof.

For example, relatively complex optical corrections in order tocompensate for visual defects of the eye can be implemented by means ofthe HOE. In this respect, for example, it is possible for an opticalfunctionality of the spectacle lens involving compensation for visualdefects of the eye to be affected by both the HOE and a lens property ofthe substrate. The substrate and the HOE can thus interact in order toimplement the optical functionality. A combined effect can be achieved.In this manner, particularly complex optical functionalities can beimplemented.

For example, the HOE can be used for implementation of an imagingdevice. In this manner, for example, the HOE can allow implementation ofdata spectacles, which more specifically produce an image from data. Thedata spectacles can be used as a head-worn device (HWD). Data spectaclesare devices that are worn on the head like conventional spectacles, andon the one hand, these data spectacles allow observation of theenvironment, and on the other, they allow observation of imaged data.The term data is to be understood here in a general sense, and can referto symbols, signs, numbers, pictures, videos and the like. With otherdevices, it is only possible to observe data, but not to simultaneouslyobserve the environment. The data can be presented in a context-relatedmanner, overlapping with the environment (augmented), and for examplecan relate to data, navigation data, message data, notifications,documentation, virtual input interfaces, etc., supplementing thesurrounding scene.

In the framework of data spectacles, the HOE can implement a widevariety of optical functions, for example, more specifically, for lightemitted by a light source assembly of the data spectacles; for example,it would be possible for the spectacle lens to have an opticalfunctionality as a light-conducting element of an imaging device. Forthis purpose, the HOE can be configured as a wavelength-specific mirrorthat modifies light of a predetermined wavelength range, i.e., morespecifically, for example, “diverts” the light in the direction of anobservation site or reflects it as a virtual intermediate image that canbe observed by the user and transmits light of other wavelengthsunchanged. In this manner, the HOE can act as a transflective beamcombiner, which for example diverts light of a predetermined wavelengthrange coming from a light source assembly of the data spectacles towardthe eye of a user and transmits wavelengths of ambient light other thanthe predetermined wavelength range unchanged. In addition, the HOE, inconnection with the data spectacles, can have optical functionalitieswith further optical effect functions. For example, the HOE can beactive for a specified angular range and leave other angular rangesunaffected, i.e. implement a wavelength-specific reflector.

The spectacle lens of the data spectacles can have a plurality of HOEs.A first HOE can be configured to divert light coming from a light sourceassembly to a further HOE. A further HOE can be configured to decouplethe light coupled in the spectacle lens in the direction of the eye ofthe user, so that the user observes an image of the image generator at aspecified viewing angle.

As a further application, identification and/or trademark elements(branding) can be implemented by means of the HOE. For example, a serialnumber of the spectacle lens could be displayed by the HOE in arelatively forgery-proof manner. Alternatively or additionally, amanufacturer of the spectacle lens could be displayed by the HOE. Forthis purpose, alternatively or additionally, a personal identificationcharacteristic of the spectacle wearer or the spectacle could bedisplayed by the HOE in a manner recognizable for the owner or theoptician.

By means of the above-described techniques, it is therefore possible tointegrate a relatively soft material of the at least one HOE-capablepolymer layer into the spectacle lens in a such a way that essentialphysical properties of the spectacle lens, such as, for example, theoptical function and mechanical strength, are not impaired or areimpaired only to a negligible extent by the at least one HOE-capablepolymer layer—for example, compared to a reference implementationwithout an HOE-capable polymer layer. Typically, conventional spectaclelenses have a layer that is comparable to the substrate of the spectaclelens according to embodiment currently under discussion. Moreparticularly, it can be possible for conventional spectacle lenses tocomprise layers that have properties similar to those of the HOE-capablepolymer layer. It can therefore be possible for such an HOE-capablepolymer layer to be integrated into an existing layer system withoutimpairing the optical function thereof.

For example, the spectacle lens can further comprise a transparent hardlayer arranged on the transparent substrate. The at least oneHOE-capable polymer layer can be arranged between the transparentsubstrate and the hard layer.

The hard layer can comprise a material that imparts to the hard layerrelatively high stiffness and strength—for example, compared to at leastone HOE-capable polymer layer and the substrate. In this manner,particularly high robustness of the spectacle lens can be achieved. Thehard layer can thus improve the thermal and mechanical properties of thespectacle lens. For example, the hard layer can comprise organicmaterial. For example, the hard layer can comprise organic/inorganichybrid materials, such as polysiloxane-based materials.

The hard layer can be provided to improve the adhesion of anantireflective layer or a clean-coat layer to the substrate. Optionally,the spectacle lens could also comprise the antireflective layer.Alternatively or additionally, the spectacle lens could also comprisethe clean-coat layer. For example, both layers can comprise inorganicmaterials. For example, the antireflective layer and the clean-coatlayer can contain a predominant portion of inorganic materials.

For example, the antireflective layer and/or the clean-coat layer can bearranged on one side of the substrate, which faces toward the one frontside of the spectacle lens. For example, the following layer sequencecould be implemented: (back side): substrate—HOE-capable polymerlayer—hard layer—antireflective layer—clean-coat layer (front side).

Alternatively or additionally, it would also be possible for theantireflective layer and/or the clean-coat layer to be arranged on aside of the substrate that faces toward the one back side of thespectacle lens. For example, the following layer sequence could beimplemented: (back side) clean-coat layer—antireflective layer—hardlayer—substrate—HOE-capable polymer layer—hard layer—antireflectivelayer—clean-coat layer (front side).

For example, the antireflective layer can comprise at least twomaterials of the following group in a stacked arrangement: SiO₂, TiO₂,ZrO₂, Al₂O₃. In this manner, for example, an interference layer stack ofoxidic materials can be formed. The layer thickness of theantireflective layer can be in the range, for example, of 200-700 nm,and preferably 300-500 nm. By means of the antireflective layer, reducedreflection of the spectacle lens can be implemented as an opticalfunctionality; the reflectivity level for light incident on the frontside of the spectacle lens can be reduced; alternatively oradditionally, the reflectivity level for light incident on the back sideof the spectacle lens can be reduced. Light reflections can be reduced.

The clean-coat layer can be provided on the front side or the back sideof the spectacle lens in order to prevent dirt from adhering. Forexample, the front side can be convex and/or the back side can beconcave. The layer thickness of the clean-coat layer can be in the rangeof 5-50 nm, and preferably in the range of less than 10 nm. For example,the clean-coat layer can comprise a material with hydrophobic and/oroleophobic properties.

In general, it is also possible for the spectacle lens to furthercomprise the antireflective layer arranged on the transparent substrate.The at least one HOE-capable polymer layer can be arranged between thetransparent substrate and the antireflective layer. More specifically,in such a scenario, it may be unnecessary to provide the hard layer.More particularly, the antireflective layer can be directly applied tothe HOE-capable polymer layer.

For example, the layer thickness of each of the at least one HOE-capablepolymer layer can be in the range of 1 μm-100 μm, and preferably in therange of 10 μm-100 μm. Such a layer thickness can make it possible toconfigure the optical functionality of the HOE in a particularlyflexible manner. Complex optical functionalities can be implemented.This can make it possible to carry out relatively strong opticalcorrections. A layer thickness in the range of a few μm can besufficient for implementation of optical functionalities.

It can be possible for an average refractive index of the at least oneHOE-capable polymer layer to be essentially the same as a refractiveindex of the transparent substrate and/or the hard layer, for example,irrespective of a local variation in the refractive index due to thelocal concatenation of the polymer in the HOE-capable polymer layer. Inthis case, “essentially the same” can mean that a deviation of therefractive index—for example, taking into account variations in thelayer thickness of the at least one HOE-capable polymer layer—causes noor no significant interference effects, such as, for example,interference rings, etc. In this respect, it can be possible for theHOE-capable polymer layer to comprise at least one oxide material suchas, for example, TiO₂ nanoparticles and/or an aromatic system and/orthiol components as (an) additive(s); typically, by means of acorresponding concentration, the refractive index of the HOE-capablepolymer layer can be selectively controlled.

For example, the at least one HOE-capable polymer layer can be arrangedon a front side of the transparent substrate. It would also be possiblefor the at least one HOE-capable polymer layer to be arranged on a backside of the transparent substrate.

For example, it would be possible for the front side to be convex.Alternatively or additionally, it would be possible for the back side tobe concave. For example, this can be a one-sided concave substrate orspectacle lens.

In general, the spectacle lens can comprise one or a plurality ofHOE-capable polymer layers. For example, it would be possible for afirst HOE-capable polymer layer to be arranged on the convex front sideof the transparent substrate and a second HOE-capable polymer layer tobe arranged on the concave back side of the transparent substrate. It ispossible for the spectacle lens to comprise one or two adjacentdiffusion barrier layers for each HOE-capable polymer layer.

The spectacle lens can further comprise the primer layer. The primerlayer can, for example, comprise the polymer matrix and/or a furtherpolymer. It is possible for the primer layer to comprise a photoreactivecomponent, i.e. separately from the HOE-capable polymer layer, which,for example—provided the HOE has not yet been formed—can have aphotoreactive component. It is also possible for the primer layer not tocomprise the HOE polymer. The primer layer may be unsuitable for formingthe HOE. For example, the primer layer can be applied from a polymerdispersion.

The layer thickness of the primer layer can in the range of 0.7-1.0 μm.Typically, the material used for the primer layer is relatively soft.For this reason, the primer layer can provide improved adhesion of thehard layer and the antireflective layer or the clean-coat layer to thesubstrate. Moreover, the primer layer can serve as a stress-absorbingsubstrate; this allows stresses, such as may occur, for example, in theball drop impact test according to the FDA standard, to be betterabsorbed.

It is typically possible for the material of the primer layer to besimilar to the material of the HOE-capable polymer layer, and morespecifically, to have similar mechanical and/or chemical properties. Forexample, the primer layer can also comprise the polymer matrix of theHOE-capable polymer layer. However, it would be possible for the primerlayer to comprise a further polymer, which can nevertheless have similarphysical and chemical properties to the polymer matrix or the HOEpolymer of the HOE-capable polymer layer. It can be therefore bepossible for various advantageous effects, as were explained above withrespect to the primer layer, alternatively or in addition to the primerlayer, to be achieved by mean of the HOE-capable polymer layer.

In the preceding, the substrate, the HOE-capable polymer layer, the hardlayer, the antireflective layer, the clean-coat layer, and the primerlayer were explained with respect to the spectacle lens. It is possiblefor the spectacle lens to comprise further or different layers. Forexample, further properties of the spectacle lens can be realized orimproved with further layers. For example, a layer can be provided inorder to reduce water condensation. Such a layer can be configured to behydrophilic. It would also be possible to provide a layer forpolarization filtering of the incident light. It is also possible toprovide a layer with photochromatic properties. In these above-mentionedtechniques, layers with a layer thicknesses of up to 100 μm aretypically used. The materials used in such layers can frequently berelatively soft, for example having a softness comparable to that of theHOE-capable polymer layer. Typically, such layers can be arranged on thepolymer substrate and, for example, be directly adjacent to it. Moreparticularly, it is possible for such layers to be arranged between thesubstrate and the hard layer.

In the preceding, aspects of a spectacle lens were illustrated accordingto various embodiments. By means of corresponding techniques, it can bepossible to integrate the HOE-capable polymer layer into a stack oflayers according to conventional spectacle lenses. In this case,integration can be carried out in such a way that a function of theconventional hard layer and antireflective layer is not or notsignificantly impaired. More particularly, it can be possible for theHOE-capable polymer layer to have mechanical properties that arecomparable to those of a conventional primer layer. For this reason, itmay be unnecessary to provide a primer layer in a spectacle lensaccording to various embodiments. This may be the case because amaterial of the HOE-capable polymer layer can have chemical andmechanical properties that are similar to a material of the conventionalprimer layer. Depending on the optical requirement profile—for example,with respect to layer thickness and efficiency—the HOE-capable polymerlayer can therefore completely or partially assume the role of theconventional primer layer.

According to a further embodiment, the invention relates to a method forproducing a spectacle lens. The spectacle lens comprises an HOE-capablepolymer layer that is suitable for forming an HOE. The method comprisescoating of a transparent substrate of the spectacle lens with aprecursor of the HOE-capable polymer layer. The method further comprisesconverting the precursor, which is arranged on the transparentsubstrate, for forming the HOE-capable polymer layer.

It is therefore possible for the HOE-capable polymer layer to beproduced in situ on the substrate. Converting the precursor into theHOE-capable polymer layer can be carried out, for example, by heating,drying, and/or, for example, thermal curing. Physical conversion stepscan thus also be used. The precursor can, for example, comprise thephotoreactive component. For example, the precursor can comprise thepolymer reactant. The precursor can comprise the photoreactive componentin the form of a dispersion or solution. It is possible for neither theprecursor nor the HOE-capable polymer layer to form the HOE; a further,optional exposure step may be required for this purpose.

It is also possible for the conversion to comprise a chemical reaction,i.e. to take place reactively. For example, the conversion can comprisethe formation of the polymer matrix of corresponding reactants, forexample, isocyanate and polyol. Further reactants can be applied, forexample, during the conversion, such as light-sensitive additives orother additives. More specifically, this can take place with ahomogeneous layer thickness.

For example, the precursor can comprise a polymeric carrier film thatcontains the HOE-capable layer. Such techniques are known, for example,from the document US 2010/0203241 A1 or under the brand name Bayfol® HXfrom the firm Bayer Material Science AG, Leverkusen, Germany. In thiscase, for example, a PUR-based polymer matrix for taking uplight-sensitive molecules can be used as the photoreactive component. Inthis case, the photoreactive component comprises the HOE-formingpolymer, which is rearranged on exposure and thus allows the differencesin the reactive index in the range of 0.005 to 0.05 that are requiredfor the formation of holograms. The precursor is not limited to apolymeric carrier film; in general, it is possible for the precursor tocomprise other or further substrate materials.

Coating of the substrate with the precursor can, for example, comprisewet coating techniques, such as, for example, immersion coating and spincoating, spraying, and/or flow coating. Alternatively or additionally,coating can comprise printing methods, such as, for example, inkjetand/or pad printing.

Furthermore, the method can comprise cleaning of the substrate prior tocoating. For example, the cleaning can be carried out using a suitablesolvent. Furthermore, the method can comprise activation of thesubstrate prior to coating. For example, activation can comprisechemical activation with a suitable agent and/or physical activation,for example, by means of suitable plasma or corona treatment.

Such techniques for producing the spectacle lens according to theembodiment currently under discussion could be used repeatedly, forexample, for a plurality of HOE-capable polymer layers.

In the preceding, techniques were illustrated in which the HOE-capablepolymer layer can be produced in situ on the substrate of the spectaclelens. However, it is also possible for the HOE-capable polymer layer tobe produced in a separate step and then transferred to the substrate.This will be explained in further detail in the following.

According to a further embodiment, the invention relates to a method forproducing a spectacle lens. The spectacle lens comprises an HOE-capablepolymer layer that is suitable for forming an HOE. The method comprisesthe coating of a carrier with a precursor of the HOE-capable polymerlayer. The method further comprises converting the precursor, which isarranged on the carrier, in order to obtain the HOE-capable polymerlayer. The method further comprises fixing of the HOE-capable polymerlayer on a transparent substrate of the spectacle lens.

With respect to the precursor, converting the precursor, the substrate,and the HOE-capable polymer layer, features explained above inconnection with further embodiments can be used. It is thereforepossible for coating of the carrier and converting the precursor to takeplace individually and separately from the substrate. In fixation of theHOE-capable polymer layer, the carrier can then be moved closer to thesubstrate; this can be carried out by turning a side of the carrier onwhich the HOE-capable polymer layer is located toward the substrate. TheHOE-capable polymer layer can then, for example, be fixed on thesubstrate by applying mechanical pressure. By means of such techniques,it is possible to produce the HOE-capable polymer layer without damagingthe substrate. Moreover, the carrier can be particularly suitable forparticipating in the steps required for conversion. For example, thecarrier can be a film or a half shell.

For example, fixation of the HOE-capable polymer can be carried out bygluing and/or laminating. After fixation of the HOE-capable polymerlayer, for example, the method can further comprise removing the carrierfrom the HOE-capable polymer layer. For this purpose, the carrier can beprepared accordingly. For example, this preparation can consist ofselective adjustment of the adhesion so that the adhesion to the carrieris weaker than to the substrate.

Alternatively, it would also be possible for the carrier to remainarranged on the substrate. The carrier can be configured for thispurpose to be transparent, at least for visible light. In such a case,it would be possible for the carrier to be coated on its back side withan antireflective layer and/or a clean-coat layer and/or a hard layerand/or a further functional layer before it is applied to the substrate.The carrier can be produced, for example, from the same material as thetransparent substrate or from a different material.

Such techniques for producing the spectacle lens according to embodimentcurrently under discussion could be repeatedly used, for example, for aplurality of HOE-capable polymer layers.

The methods for producing the spectacle lens can further compriseapplying the hard layer to the HOE-capable polymer layer. Alternativelyor additionally, the methods for production can further compriseapplying the antireflective layer. Alternatively or additionally, themethods for production can further comprise applying the clean-coatlayer.

The hard layer can serve to improve adhesion of the antireflectivelayer, the clean-coat layer and/or further layers to the substrate.Moreover, the hard layer can improve the thermal and mechanicalproperties of the spectacle lens. The layer thickness of the hard layercan, for example, be 1-3 μm. Typically, the hard layer comprisespolysiloxane-based organic/inorganic hybrid materials. It is possible,for example, for applying the hard layer to comprise wet chemicaltechniques. The wet chemical techniques can comprise, for example,immersion coating or spin coating. In addition, application can comprisehard layer curing. The curing can, for example, comprise thermal curingby means of heating and/or UV exposure.

For applying the antireflective layer, an interference layer stackcomposed of alternating oxidic materials such as SiO₂, TiO₂, ZrO₂ orAl₂O₃ in a suitable order and layer thickness can be applied by means ofa physical deposition process from the gas phase (physical vapordeposition, PVD). The layer thickness of the antireflective layer canbe, for example, in the range of 300 nm-500 nm.

Optionally, by using similar processes, more specifically PVD, theclean-coat layer composed of corresponding fluorine-containingprecursors can be applied as an optically inactive uppermost layer ofthe spectacle lens. The clean-coat layer can have a layer thickness ofless than 10 nm.

The HOE-capable polymer layer can be arranged on a convex front side ofthe transparent substrate. It is possible for the HOE-capable polymerlayer to be arranged on a concave back side of the transparentsubstrate. In so-called back side processing, arrangement of theHOE-capable polymer layer on the spherical front side can offeradvantages.

For example, the precursor and/or the HOE-capable polymer layer cancomprise the photoreactive component and/or the HOE polymer and/or thepolymer matrix. The method can further comprise applying a primer layercomprising a polymer matrix and/or a further polymer to the substrate.For example, applying the primer layer can be carried out by a wetchemical process based on a polymer dispersion. Typically, the layerthickness of the primer layer is in the range of 0.7-1.0 μm. Thestability or robustness of the spectacle lens can be further increasedby applying the primer layer.

The method for producing the spectacle lens can further comprisespatially resolved exposure of the HOE-capable polymer layer in order toform the HOE. Exposure can be carried out, for example, by means ofwriting techniques in which one or a plurality of laser beams is/areguided or scanned over the surface of the HOE-capable polymer; in thiscase, the laser beams can have a relatively small-area beam diameter.Alternatively or additionally, interference techniques can be used inwhich a plurality of relatively large-area laser beams are used. The HOEpolymer can be formed by means of exposure from the photoreactivecomponent, i.e., for example, the photomonomer or photopolymer. Theimage to be exposed can then be fixed. In this case, light-sensitivecomponents of the HOE-capable polymer layer can react off and form alight-insensitive film. This applies for example to a photoreactivecomponent remaining after exposure, for example at unexposed sites.

It is possible for exposure to take place in the uncoated HOE-capablepolymer layer, i.e., for example, before applying the hard layer, andoptionally the antireflective layer and/or the clean-coat layer, etc.However, it is also possible for spatially resolved exposure of theHOE-capable polymer layer to take place after applying the hard layer.More specifically, this can be desirable in cases where the hard layer,and optionally the antireflective layer and/or the clean-coat layer, aretransparent to the light used for exposure and cause no or nosignificant optical interference effects. In this case, blackening ofthe back side (black backing) can be used to reduce or prevent back sidereflections.

In the case described above, following exposure after applying the hardlayer, and optionally the antireflective layer and the clean-coat layer,it can be possible to keep or store a prefabricated spectacle lens withall of the layers of a corresponding stack of layers. Exposure can thenbe carried out to form the HOE. More specifically, this can allowsimpler and more rapid production of the spectacle lens with anintegrated HOE.

A scenario was described above in which converting the precursor inorder to obtain the HOE-capable polymer layer is carried out on acarrier, wherein the HOE-capable polymer layer is then fixed on thetransparent substrate of the spectacle lens. More particularly, it ispossible in such a scenario for spatially resolved exposure of theHOE-capable polymer layer to take place before fixation of theHOE-capable polymer layer on the transparent substrate. In other words,the HOE can already be formed on the carrier, for example, a film, andthe exposed HOE-capable polymer layer, which already constitutes theHOE, can then be fixed on the substrate. Fixation can be carried out bymeans of laminating and/or gluing. In this case, it can be desirable atthe time of exposure to make allowances for compression/distortion ofthe HOE due to the geometry of a surface of the substrate. For example,spatially resolved exposure can comprise the obtaining of geometric datathat describe a geometry of the substrate of the spectacle lens. Thespatially resolved exposure can further comprise the determining controldata depending on the geometric data. The control data can describe anintensity and phase of the spatially resolved exposure. Spatiallyresolved exposure can take place using the control data. By means ofsuch techniques, it is possible to carry out exposure on the carrier ina separate process. Black backing can also be easier to carry out.

In the preceding, various techniques for producing the spectacle lenscomprising the HOE-capable polymer layer were explained. In general, theabove-described techniques can be carried out in prescription lensproduction on a processed prescription lens or finished lens. However,it would also be possible for the above-described techniques to becarried out with respect to a semifinished lens from which aprescription lens is to be produced in a later step. In the latter case,it can be advantageous to use the hard layer to protect the HOE-capablepolymer layer from damage in subsequent prescription lens production. Insuch a case, processing in prescription lens production should becarried out on the side of the spectacle lens that is not coated withthe HOE-capable polymer layer.

The features and features explained above, which are described in thefollowing, can be used not only in the corresponding combinationsspecifically set forth, but also in further combinations or inisolation, without departing from the scope of protection of the presentinvention.

BRIEF DESCRIPTION OF THE FIGURES

The above-described properties, features, and advantages of thisinvention and the manner in which these are achieved become clearer andeasier to understand in connection with the following description of theexamples, which are described in further detail with reference to thedrawings.

FIG. 1 is a schematic exploded view of a spectacle lens with variouslayers according to various embodiments.

FIG. 2 is a flow diagram of a method for producing a spectacle lensaccording to various embodiments, wherein in said method, an HOE-capablepolymer layer that is suitable for forming an HOE is produced on aseparate carrier.

FIG. 3 is a flow diagram of a method for producing a spectacle lensaccording to various embodiments, wherein in said method, an HOE-capablepolymer layer that is suitable for forming the HOE is produced in situon a substrate of the spectacle lens.

FIGS. 4-6 illustrate method steps of the method of FIG. 2 by means ofschematic drawings of various production stages of the spectacle lens.

FIGS. 7-10 illustrate method steps of the method according to FIGS. 2and 3 by means of schematic drawings of various production stages of thespectacle lens.

FIGS. 11-14 illustrate method steps of the method according to FIGS. 2and 3 by means of schematic drawings of various production stages of thespectacle lens.

FIG. 15 is a schematic exploded view of a spectacle lens with variouslayers according to various embodiments.

FIG. 16 is a schematic exploded view of a spectacle lens with variouslayers according to various embodiments.

FIG. 17 is a schematic side view of data spectacles with an HOEaccording to various embodiments.

FIG. 18 is a schematic side view of data spectacles with an HOEaccording to various embodiments.

DETAILED DESCRIPTION OF EXAMPLES

In the following, the present invention is described in further detailby means of preferred embodiments with reference to the drawings. In thefigures, the same reference numbers refer to the same or similarelements. The figures are schematic views of various embodiments of theinvention. Elements shown in the figures are not necessarily drawn toscale. Rather, the various elements shown in the figures are shown insuch a manner that their function and purpose become clear to the personskilled in the art.

In the following, techniques are explained in connection with thepreparation of an HOE-capable material in a spectacle lens.

FIG. 1 shows a spectacle lens 100 according to various embodiments in anexploded schematic drawing. The spectacle lens can, for example, be usedin spectacles such as data spectacles (not shown in FIG. 1). Thespectacle lens 100 comprises a substrate 101. The center thickness 101 aof the substrate 101 is typically approx. 1-3 mm. The substrate istransparent to light in the visible wavelength range.

An HOE-capable polymer layer 102 is arranged adjacent to the substrate101. The HOE-capable polymer layer 102 is suitable for forming the HOE.The HOE-capable polymer layer 102 comprises, for example, an HOE polymeror a photoreactive component comprising a polymer reactant of the HOEpolymer. The HOE polymer can be formed by means of local polymerizationand/or diffusion processes of the polymer reactant, which in turn canlead to local variation in the refractive index. This can make itpossible to implement an optical function of the spectacle lens 100. TheHOE polymer or the photoreactive component can be embedded, for example,in a PUR-based polymer matrix. For example, one or two diffusion barrierlayer(s) could be further provided adjacent to the polymer layer 102(not shown in FIG. 1).

FIG. 1 further illustrates the layer thickness 102 a of the HOE-capablepolymer layer 102. The layer thickness 102 a of the HOE-capable polymerlayer is in a range of 1 μm to 100 μm, and preferably in a range of 50μm to 100 μm. Typically, the effect on the optical properties of thespectacle lens 100 exerted by the HOE can be greater with increasinglayer thickness 102 a of the HOE-capable polymer layer 102. By means ofgreater layer thicknesses 102 a, more complex optical functionalitiescan be implemented, i.e., for example, the optical path of the lightthrough the HOE can be more strongly modified.

The spectacle lens 100 of FIG. 1 comprises a multilayer coating, furthercomprising a hard layer 103-1 and an antireflective layer 103-2. Thelayer thickness 103-1 a of the hard layer 103-1 is in the range of 1 μmto 3 μm. The layer thickness 103-2 a of the antireflective layer 103-2is in the range of approx. 300 to 500 nm. For example, theantireflective layer 103-2 has an interference layer stack composed ofoxidic materials such as SiO₂, TiO₂, ZrO₂, and Al₂O₃ in a suitablesequence and layer thickness.

Alternatively or additionally, an antireflective layer can be providedon a back side 100 b of the spectacle lens 100.

Optionally, for example, the spectacle lens 100 can comprise aclean-coat layer (not shown in FIG. 1). The clean-coat layer can, forexample, adjacent to the antireflective layer 103-2, form a closure ofthe spectacle lens 100 on its front side 100 a. The clean-coat layercan, for example, have a layer thickness in the range of 5 nm-50 nm.

FIG. 1 shows a scenario in which the HOE-capable polymer layer 102 isarranged on a convex front side 181 of the substrate 101, which facestoward the front side 100 a of the spectacle lens 100. However, it wouldalso be possible for the HOE-capable polymer layer 102 to be arranged ona concave back side 182 of the substrate 101, which faces toward theback side 100 b of the spectacle lens 100.

FIG. 1 shows a scenario in which the spectacle lens 100 comprises anindividual HOE-capable polymer layer 102. However, it would also bepossible for the spectacle lens 100 to comprise more than oneHOE-capable polymer layer 102. For example, the spectacle lens 100 couldcomprise a first HOE-capable polymer layer 102 on the convex front side181 of the transparent substrate 101 and a second HOE-capable polymerlayer on the concave back side 182 of the transparent substrate 101 (notshown in FIG. 1).

By means of a combination of a plurality of HOE-capable polymer layers102, which, for example, form various HOEs, special opticalfunctionalities can also be achieved by coherent or incoherentinteraction of the various HOEs. This can be desirable, for example, inconnection with the implementation of data spectacles. Examples of thisare arrangements according to the actuator-compensator principle, cf.the German patent application with application no. 102014209792.4. As afurther example of the arrangement, a multilayer system comprising aplurality of HOE-capable polymer layers forming various HOEs would beconceivable, said system being used for so-called angle multiplexing. Inthis case, the optical functionality of an individual HOE, for examplefocussing, is limited to a narrow viewing angle range of the spectaclewearer, while the other viewing angle ranges are unaffected by this HOE.In such a scenario, each layer of the multilayer system can contain afurther HOE that is optically functional for a different viewing anglerange. The HOEs act independently of one another, so that eachconstitutes an independent optical function for a defined viewing anglerange. Together, their optical action extends over the entire viewingangle range.

FIG. 2 shows a flow diagram of a method for producing a spectacle lens100 according to various embodiments. In this case, formation of theHOE-capable polymer layer 102 is not carried out in situ on thesubstrate 101, but separately on a separate carrier.

In step S1, the carrier is first coated with a precursor of theHOE-capable polymer layer 102. In this case, the precursor of theHOE-capable polymer layer 102, for example, can be liquid or solid; theprecursor can, for example, be prepared in film form. The precursor ofthe HOE-capable polymer layer 102 cannot yet be suitable, or can besuitable only to a limited extent, for forming the HOE. For example, theprecursor can comprise a special formulation of polymers that aresuitable for forming the polymer matrix; it would also be possible forthe precursor to comprise reactants of the polymers that are suitablefor forming the polymer matrix, depending on whether or not a reactiveconversion takes place in step S2. For example, the precursor cancomprise further additives, such as, for example, a catalyst or a flowpromoter, which are required for forming the polymer matrix. Theprecursor can, for example, contain photoreactive components, which, forexample, can comprise monomers, initiators, and/or dyes, etc.

In step S2, the precursor for forming the HOE-capable polymer layer 102is converted. In step S2, for example, thermal curing of the precursorcan be carried out to form a stable film as the HOE-capable polymerlayer 102; for example, the formulation can be converted by evaporationof the solvent into a solid film, for example, by forming the polymermatrix. Alternatively or additionally, reactive process steps thatinclude a chemical reaction can also be carried out in step S2. Forexample, in step S2, the polymer matrix can be formed by a suitablereaction of individual molecules. In step S2, for example, furtheradditives and/or light-sensitive additives can be added to theprecursor.

In step S3, the HOE-capable polymer layer 102 is fixed on the substrate101. This is typically carried out by gluing or laminating of theHOE-capable polymer layer 102 onto the substrate. It would be possibleto subsequently remove the carrier from the spectacle lens 100. However,it is also possible for the carrier to remain on the HOE-capable polymerlayer 102.

In step S4, the HOE-capable polymer layer 102 is exposed to form theHOE. Step S4 is an optional step; however, step S4 should be carried outif the HOE is actually to be formed. In step S4, the polymer reactant isconverted into the HOE polymer; in this case, reactive conversion of thephotoreactive component, for example, a photomonomer or a photopolymer,takes place during polymerization and/or diffusion. This process resultsin spatially well-defined variation of the refractive index in thepolymer layer, allowing optical features in the form of the HOE to beimplemented.

FIG. 3 shows a flow diagram of a further method for producing aspectacle lens 100 according to various embodiments. In this case, theformation of the HOE-capable polymer layer 102 takes place in situ onthe substrate 101. The substrate 101 is first coated with the precursorin step T1.

Step T2 involves conversion of the precursor for forming the HOE-capablepolymer layer 102. Step T2 can be carried out according to step S1 ofFIG. 2.

In step T3, the HOE-capable polymer layer 102 is exposed to form theHOE. Step T3 is an optional step; step T3 must be carried out if the HOEis actually to be formed. Step T3 can be carried out according to stepS4 of FIG. 2.

With respect to both step S3 of FIG. 2 and step T1 of FIG. 3, it can bedesirable to pretreat the corresponding surface 181, 182 of thesubstrate 101 before applying the HOE-capable polymer layer 102 or theprecursor of the HOE-capable polymer layer 102. For example, thecorresponding surface 181, 182 of the substrate 101 can be cleaned.Alternatively or additionally, the corresponding surface 181, 182 of thesubstrate 101 can be activated.

FIGS. 4-6 show schematic views of various production stages orproduction pieces of the spectacle lens 100 according to the methodaccording to FIG. 2. In FIG. 4—which shows a situation A—the HOE-capablepolymer layer 102 is on the carrier 105. For example, the carrier 105can comprise a film or a half shell. For example, the half shell can beconfigured in a concave or convex shape. The carrier 105 can be formedin a complementary manner to the front side 181 of the substrate 101.Adjacent to the HOE-capable polymer layer 102, furthermore, anadhesive/laminate coating 106 is arranged on the carrier 105.Alternatively or additionally to the adhesive/laminate coating 106,solvent adhesion techniques can also be used.

FIG. 5 shows a situation B in which the carrier 105, the HOE-capablepolymer layer 102, and the adhesive/laminate coating 106 are broughtinto contact with the substrate 101. More particularly, theadhesive/laminate coating 106 is brought into contact with the frontside 181 of the substrate 101. Alternatively or additionally, it wouldalso be possible to apply the HOE-capable polymer layer 102 to the backside 182 of the substrate 101.

FIG. 6 shows a situation C in which the carrier 105 is detached from theHOE-capable polymer layer 102 and removed therefrom (indicated in FIG. 6by the vertical arrow). Alternatively, it would also be possible for thecarrier 105 to remain on the HOE-capable polymer layer 102. In thelatter case, it can be possible, for example, for the hard layer and/orthe antireflective layer (neither shown in FIG. 6) to be formed on theouter surface of the carrier 105.

With this, situation C in the production process of the spectacle lens100 is reached, in which the HOE-capable polymer layer 102 is arrangedon the substrate 101. After this, coating with the hard layer 103-1and/or the antireflective layer 103-2 and/or the clean-coat layer can becarried out (not shown in FIGS. 4-6). In general, it is also possiblefor the hard layer (not shown in FIGS. 4-6) to be alreadyapplied/laminated with the HOE-capable polymer layer 102.

FIGS. 7-10 and FIGS. 11-14 show various scenarios for exposure of theHOE-capable polymer layer 102 to form the HOE. In this case, a situationA is first shown in FIG. 7 in which the HOE-capable polymer layer 102 isarranged on the substrate 101. For example, an adhesive/laminate layer(not shown in FIG. 7) could fix the HOE-capable polymer layer 102adjacent to the front side 181 of the substrate 101. The HOE-capablepolymer layer 102 is suitable for forming the HOE; for this purpose, theHOE-capable polymer layer 102 comprises a suitable photoreactivecomponent which, for example, comprises the photomonomer. In FIG. 7, areaction of this photoreactive component of the polymer layer has notyet taken place. The HOE-capable polymer layer 102 comprises the polymermatrix.

FIG. 8 shows a situation B during exposure of the HOE-capable polymerlayer 102. Exposure is carried out in a spatially resolved andphase-coherent manner, with a well-defined phase and intensity(indicated in FIG. 8 by the two solid arrows). In this manner, the HOE900 is formed (cf. FIG. 9). FIG. 9 shows a situation C in which the HOE900 has an identification or branding function. For this reason, it issufficient for the HOE 900 to extend only over a partial area of theentire surface of the HOE-capable polymer layer 102.

However, it would also be possible for exposure to take place such thatthe HOE 900 modifies the optical functionalities of the spectacle lens100 relating to visual defects in the eye of the spectacle wearer. Moreparticularly, in such a case, it can be desirable if the HOE 900essentially extends over the entire surface of the HOE-capable polymerlayer 102 (not shown in FIG. 9). In this manner, it can be possible tohomogeneously implement corresponding optical functionality in the areaof the spectacle lens 101.

In situation D of FIG. 10, the HOE-capable polymer layer 102, which nowforms the HOE 900, is coated with the hard layer 103-1. Optionally,coating with the antireflective layer 103-2 and/or the clean-coat layercan be carried out (not shown in FIG. 10).

FIGS. 11-14 shows further techniques relating to exposure of theHOE-capable polymer layer 102 to form the HOE 900. In these techniques,the HOE-capable polymer layer 102 is exposed after applying the hardlayer 103-1.

In situation A of FIG. 11, the HOE-capable polymer layer 102 is formedon the substrate 101. FIG. 12 shows a situation in which the hard layer103-1 is arranged on the substrate 101, wherein the HOE-capable polymerlayer 102 is located between the hard layer 103-1 and the substrate 101.The HOE-capable polymer layer 102 is suitable for forming an HOE 900.However, the HOE 900 is not yet shown in the situation of FIG. 12.

FIG. 13 shows a situation C during exposure of the HOE-capable polymerlayer 102. The exposure is carried out through the hard layer 103-1,wherein the hard layer 103-1 is transparent for a used wavelength of theexposure light. Optionally, it would also be possible, in situation C ofFIG. 13, for an antireflective layer to be arranged on the hard layer103-1 (not shown in FIG. 13). Exposure could then also be carried outthrough the antireflective layer. In this case, particularly highefficiency of exposure can be achieved, as it is possible to reducereflection losses.

In situation D of FIG. 14, the HOE 900 is formed. This can be followedby fixation or bleaching in order to deactivate areas not exposed duringthe exposure. In this manner, subsequent modification, weakening, ordestruction of the HOE 900 can be prevented. This is frequently alsoreferred to as fixation of the HOE 900.

Techniques according to FIGS. 11-14 are advantageous in that thefinished spectacle lens 100, for example in situation B according toFIG. 12, can be stored and exposed only at a later time in order to formthe HOEs 900. This can allow particularly rapid production of thefinished spectacle lens 100 with the formed HOE 900.

FIG. 15 illustrates a spectacle lens 100 according to variousembodiments of the invention in a schematic exploded view. The spectaclelens 100 in FIG. 15 has two hard layers 103-1 and two antireflectivelayers 103-2. A primer layer 105 is arranged on the back side 182 of thesubstrate 101. The primer layer 105 is optional. By means of the primerlayer 105, the spectacle lens 100 can be strengthened. Moreover,improved adhesion of the hard layer 103-1 arranged on the back side andthe antireflective layer 103-2 to the substrate 101 can be achieved;this is comparable to the effect that can be achieved by the polymerlayer 102 with respect to the hard layer 103-1 arranged on the frontside and the antireflective layer 103-2.

In the scenario of FIG. 15, for example, it would also be possible—inaddition to the primer layer 102—to arrange a further primer layer onthe front side 181 of the substrate 101 (not shown in FIG. 15). Forexample, the primer layer(s) could be applied using techniques ofimmersion coating.

With reference to FIG. 16, instead of the primer layer 105, a furtherHOE-capable polymer layer 112 could also be provided. In the scenario ofFIG. 16, the HOEs 900 work together to implement optical functionality.

In the preceding, techniques were illustrated for providing anHOE-capable polymer layer 102 that is suitable for forming an HOE 900 ina spectacle lens 100. Such techniques show various effects andadvantages. For example, it is possible to integrate the HOE-capablepolymer layer 102, which is suitable for forming the HOE 900, into thespectacle lens 100 while maintaining the layered structure of aconventional spectacle lens 100. More particularly, it is possible for abreak-stabilizing action of the primer layer 105 to be achieved by meansof the HOE-capable polymer layer 102. For this reason, it can beunnecessary to provide the primer layer 105. Certain stresses, which forexample may occur during the ball drop impact test according to FDAstandards, can be better withstood in this manner. Typically, the HOEpolymer or polymer reactant or a polymer matrix, which is used in theHOE-capable polymer layer 102, is similar to a polymer used in theprimer layer 105. For this reason, it can also be possible for similarpolymer chemistry such as that known, for example, with respect to theprimer layer 105, to be used for the treatment of the HOE-capablepolymer layer 102. More particularly, favorable adhesion of the polymerof the HOE-capable polymer layer 102 to the substrate 101 can beachieved. For this purpose, the substrate 101, for example, can becleaned and/or activated. Moreover, favorable adhesion of the hard layer103-1 to the HOE-capable polymer layer 102 can be achieved. This canmake it possible to ensure overall favorable strength and durability ofthe spectacle lens 101. Moreover, it is possible according to theabove-described techniques to provide semifinished or finished lensesthat already comprise the hard layer 103-1 and optionally theantireflective layer 103-2 and/or the clean-coat layer with theHOE-capable polymer layer 102. Exposure of the HOE-capable polymer layer102 to form the HOEs 900 can be carried out in a needs-based andindividual manner, for example in order to provide customer data and/oradapted optical corrections. By means of the above-described techniques,it is also possible for the HOE 900 to be formed over the entire surfaceof the spectacle lens 100. In this case, an optical functionalityimplemented by means of the HOE 900 can be limited to a relatively minorextent. More particularly, it can also be possible to implement complexoptical functionalities which, for example, go beyond a pureidentification/branding function. By means of the above-describedtechniques, it is also possible to integrate more than one HOE-capablepolymer layer 102 into the spectacle lens 100. More particularly, it canbe possible to arrange a plurality of polymer layers 102, 112 ondifferent sides 181, 182 of the substrate 101. In this manner, morecomplex optical functionalities can be achieved by means of the variousHOEs 900 of the various polymer layers 102, 112.

In FIGS. 17 and 18, embodiments of the HOE 900 used in combination withdata spectacles 1700 are illustrated. The HOE 900 reflects light emittedfrom a light source assembly 1750 of the data spectacles 1700. In thiscase, for example, the HOE 900 implements the optical functionality of awavelength-specific mirror; alternatively or additionally, it would alsobe possible for the HOE 900 to implement the optical functionality of anangle-specific reflector and/or a transflective beam combiner. In thisrespect, the HOE 900 thus shows imaging functionality.

Although only one individual HOE 900 is shown in each of FIGS. 17 and18, the various optical functionalities implemented in connection withthe data spectacles 1700 using the techniques of holography can also beimplemented using two or more HOEs 900 interacting optically.

For purposes of clarity, only the substrate 101 and the HOE 900 arefurther illustrated in FIGS. 17 and 18; however, the spectacle lens 100can also have an arrangement and number of elements as discussed above.

In detail, the data spectacles 1700 comprise a frame 1710. The frame1710 has a housing in which the light source assembly 1750 is arranged.In general, the light source assembly 1750 can be configured in a widevariety of forms and comprise a variety of elements; for example, thelight source assembly 1750 could comprise fewer or more elements thanshown in FIGS. 17 and 18. In the example of FIGS. 17 and 18, the lightsource assembly 1750 comprises a display device 1751, such as, forexample, a light-emitting diode (LED) display, a display with organicLED (OLED) technology, or a liquid crystal display (LCD). For example,the display device could comprise a LCD on silicon (liquid crystal onsilicon, LCOS) display; more specifically, this could be used inconnection with a pole splitter and an LED illumination unit arranged inthe beam path behind the display device and in the direction of thespectacle lens 100. As a display device 1751, one could also use a laserlight source, for example, in combination with a scanning device such asa moveable mirror, in order to scan the light beam over the retina ofthe eye of the user.

The light source assembly 1750 in the example of FIGS. 17 and 18 furtherhas a filter element 1752 that filters light in a wavelength-specificmanner. For example, the filter element 1752 can be a band pass elementthat selectively allows light of a specified wavelength band to passthrough. More particularly, the filter element 1752 is optional.

The light source assembly 1750 further comprises an optical device 1753.The optical device 1753 is configured to guide light in the direction ofthe HOE 900 located in the spectacle lens 100. For this purpose, theoptical device 1753 could comprise, for example, one or a plurality oflenses. The optical device 1753 could also alternatively or additionallycomprise one or a plurality of mirrors, for example, one or a pluralityof moveable mirrors.

In this manner, the light source assembly 1750 can be configured to emitlight in the direction of the spectacle lens 100, more specifically, theHOE 900.

The HOE-capable polymer layer 102 or the HOE 900 is then configured toreflect the emitted light to the eye of a wearer of the data spectacles1700. In the scenario of FIG. 17, the HOE 900 is arranged for thispurpose adjacent to the front side 100 a of the spectacle lens 100; inthe scenario of FIG. 18, the HOE 900 is arranged for this purposeadjacent to the back side 100 b of the spectacle lens 100. Here, in thescenario of FIG. 17, the light source assembly 1750 and the spectaclelens 100 are arranged with respect to each other such that the beam pathof the light runs from the light source assembly 1750 to the HOE 900inside the substrate 101 of the spectacle lens 100; here, internalreflection on the surfaces 100 a, 100 b of the spectacle lens 100 can beused for beam guidance (indicated in FIG. 17 by the broken line). In thescenario of FIG. 18, the light source assembly 1750 and the spectaclelens 100 are arranged with respect to each other such that the beam pathof the light also runs from the light source assembly 1750 to the HOE900 outside of the substrate 101 of the spectacle lens 100.

Of course, the features of the above-described embodiments and aspectsof the invention can be combined with one another. More particularly,the features can be used not only in the described combinations, butalso in other combinations or individually, without departing from thescope of the invention.

In the foregoing, the term “spectacle lens” was selected for purposes ofsimplicity and is not to be interpreted as limitative with respect tothe material. More particularly, the spectacle lens can also be producedfrom one or a plurality of plastics.

The invention claimed is:
 1. A method for producing a spectacle lenscomprising a holographic optical element-capable (HOE-capable) polymerlayer, wherein the HOE-capable polymer layer is suitable for forming aholographic optical element, wherein the method comprises: coating of atransparent substrate of the spectacle lens with a precursor of theHOE-capable polymer layer, and converting the precursor, which isarranged on the transparent substrate, for forming the HOE-capablepolymer layer; and performing spatially resolved exposure of theHOE-capable polymer layer to form the holographic optical element,wherein the performing the spatially resolved exposure comprises:obtaining geometric data describing a geometry of the transparentsubstrate of the spectacle lens; and based on the geometric data,determining control data describing an intensity and a phase of thespatially resolved exposure, wherein the performing the spatiallyresolved exposure is carried out with the control data.
 2. The method ofclaim 1, wherein the method further comprises: applying at least one ofa hard layer, an antireflective layer, or a clean-coat layer to theHOE-capable polymer layer.
 3. The method of claim 2, wherein theperforming the spatially resolved exposure of the HOE-capable polymerlayer takes place after applying at least one of the hard layer, theantireflective layer, and the clean-coat layer.
 4. The method of claim1, wherein the precursor and/or the HOE-capable polymer layer comprise aphotoreactive component and/or an HOE polymer and/or a polymer matrix,and wherein the method further comprises: applying a primer layercomprising the polymer matrix and/or a further polymer to thetransparent substrate.
 5. A method for producing a spectacle lenscomprising a holographic optical element-capable (HOE-capable) polymerlayer, wherein the HOE-capable polymer layer is suitable for forming aholographic optical element, wherein the method comprises: coating of acarrier with a precursor of the HOE-capable polymer layer; convertingthe precursor, which is arranged on the carrier, to obtain theHOE-capable polymer layer; performing fixation of the HOE-capablepolymer layer on a transparent substrate of the spectacle lens; andperforming spatially resolved exposure of the HOE-capable polymer layerto form the holographic optical element, wherein the performing thespatially resolved exposure comprises: obtaining geometric datadescribing a geometry of the transparent substrate of the spectaclelens; and based on the geometric data, determining control datadescribing an intensity and a phase of the spatially resolved exposure,wherein the performing the spatially resolved exposure is carried outwith the control data.
 6. The method of claim 5, wherein the performingthe fixation of the HOE-capable polymer layer is carried out by gluingand/or laminating.
 7. The method of claim 6, wherein the method, afterthe fixation of the HOE-capable polymer layer on the transparentsubstrate, further comprises: removing the carrier from the HOE-capablepolymer layer.
 8. The method of claim 5, wherein the performing thespatially resolved exposure of the HOE-capable polymer layer takes placebefore the fixation of the HOE-capable polymer layer on the transparentsubstrate.
 9. A method for producing a spectacle lens comprising aholographic optical element-capable (HOE-capable) polymer layer, whereinthe HOE-capable polymer layer is suitable for forming a holographicoptical element, wherein the method comprises: coating of a carrier witha precursor of the HOE-capable polymer layer; converting the precursor,which is arranged on the carrier, to obtain the HOE-capable polymerlayer; performing spatially resolved exposure of the HOE-capable polymerlayer to form the holographic optical element; and performing fixationof the HOE-capable polymer layer on a transparent substrate of thespectacle lens, wherein the performing the spatially resolved exposureof the HOE-capable polymer layer takes place before the performing thefixation of the HOE-capable polymer layer on the transparent substrate,and wherein the performing the spatially resolved exposure comprises:obtaining geometric data describing a geometry of the transparentsubstrate of the spectacle lens, and depending on the geometric data,determining control data describing an intensity and a phase of thespatially resolved exposure, wherein the performing the spatiallyresolved exposure is carried out with the control data.